Electric warp stop-motion



Aug. 4, 1931. o. v. PAYNE ELECTRICAL WARP STOP MOTION Filed July 9, 1950 jVVE/VTUR 0504/? l/PA wvz Patented Aug. 4, 1931 UNHTED STATES tenses PATENT FFI CE OSCAR V. PAYNE, OF WORCESTER, I/IASSAGHUSETTS, ASSIGIIOR TO CHOIX'IPTON 6:

MASSACHUSETTS ELECTRIC WARP STOP-I ZO'IJION Application filed July 9,

This invention relates to improvements in electrical warp stop motions and it is the general object of the invention to facilitate assembly of the several elements of such a warp stop motion so that contact may be estab lished between the various electrodes.

It is further object of the invention to provide a unit construction for warp stop motions having contacting devices such that each unit carries a contact member, there being a contact member for each live electrode and supporting unit.

It is another object of the invention to pro vide a built-up electrical warp stop motion wherein each unit which is added will automatically continue the circuit which starts with the first unit, so that a single lead wire from any of the units will be in electric contact with all of the live electrodes of the several contact bars.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying, drawings, wherein two forms of the invention are shown,

Fig. 1 is a vertical transverse section through a motion having the preferred form of my invention applied thereto,

Fig. 2 is a vertical detailed section on line 22 of Fig. 1, r

Fig. 3 is a view similar to a portion of Fig. 1, but showing a modified form of the invention, and

Fig. 4C is a detailed section on line 4:' .t of Fig. 2 on an enlarged scale.

Referring particularly to Figs. 1, 2 and 4:, I have shown a supporting threaded rod R which may be held in any approved manner to the loom or other form of machine to which the invention may be applied. Strung along said rod is a plurality of substantially similar units 10 the right hand one of which as shown in Fig. 1 receives the thrust of a nut 11 on the rod R, while the left hand unit engages a second somewhat similar end piece 12 which engages a second nut 13. When the twonuts are tightened the units are forced together to *0 form a substantially unitary structure be- 1930. Serial No. 465,719.

tween which lie separator bars 14 and detector bars designated generally herein at 15. Each detector bar has an outside grounded shielding member 16 which is wrapped part ly around a live electrode 17 insulated therefrom and supported thereby. The drop wire I) has inwardly extending projections 18 which are adapted for engagement with a rib 19 and then live electrode 17 at the time of warp fault.

The matter thus far described of itself forms no part of my present invention, being substantially the same as motions which have gone into It is sufficient to state herein that the live electrodes 17 may have a vertical exposed surface and that a fallen drop wire connects the two electrodes of the corresponding contact bar to establish an external circu1t not shown herein but effective to stop a loom or warper or in any other way give indication that a fault exists in the warp.

In carrying my invention into effect 1 provide each of the units with an ercnsion 30 having a bore 31 therein through which 0::- tends a small bolt 32 having a head 33. The lower end of the bolt has a nut U3: threaded thereon. A washer of insulating material 35 may lie between the extension 3 and the wire 36 which is caught under the nut 34.

wire is the only contact which the unitary s structure has with the external circuit ex cept the grounded return.

The bolt extends through the perforated parts of two springs 37 and 38 which extend, rspectively, substantially vertically and horizontally. A second insulating washer 39 between the springs and the extension 30 hoe ps1 said springs out of electric contact with the unit to which they are attached. A washer lfi of insulating material is located in the bore 31 and holds the bolt out of contact electrically with the unit. In this way the wire 36 is electrically connected to the springs 37 and 38 and is insulated from the supporting structure.

By referring to Fig. 1 it will be seen that the upwardly extending spring 37 iich has a rounded surface 11 is held by spring tension against the vertical face of the adjacent live electrodes 17, while the corresponding spring 38 which has a downwardly facing curved surface 42 extends over and has electric contact with the head 33 of the bolt carried by the adjacent unit.

So far as the electrical connections are concerned all of the units and the end plates 12 are the same.

In the preferred form of the invention the right hand unit may be placed on the bar or rod R against the nut 11 and then the next unit together with its contact bar may be moved against the first one, this operation establishing contact between the live electrode of the contact bar and also the head of the bolt of the second unit. In like manner the other units are applied, the addition of each unit continuing the circuit and also establishing contact with the live electrode. It is to be understood that the normal unstrained position of the springs 87 and 38 will be somewhat lower than that shown in Fig. 1, so that when each new unit together with its contact bar is slipped into position along the bar 10 the springs will be placed under suflicient tension to assure continuance of proper electric contact.

In the modified form of the invention the extension may have a bolt 51 extending therethrough which is similar in all respects to bolt 32 except that it is horizontal and instead of having two springs is provided with a single spring 52 having an upwardly extending end 53 to have contact with the live electrode 17 and having a lower end 54 to contact with the head of the adjacent screw. A wire 55 corresponding to wire 36 of the preferred form is connected to the left hand bolt and from the connections apparent in Fig. 3 all of the live electrodes will be energized by the single wire 55.

From the foregoing it will be seen that in each of the two forms illustrated I provide a warp stop motion unit having means for energizing a live electrode of a contact bar and also means for continuing the circuit to the next unit. It will be apparent that a circuit common to all of the contact bars is established by the springs which contact with the heads of the bolts and that the lead-in wire may be connected to any bolt to energize all of the live electrodes. Furthermore, as each unit is put in position it automatically established electrical connection with units already positioned.

Having thus described my invention it will be seen that changes and'modifications may be made therein by those skilled in the art without departing from the spirit and I scope of the invention and I do not wishto be tween two separate units, and means carried by each unit to energize the live elect-rode of one of the bars and establish electric connection with an adjacent unit.

2. In an electrical warp stop motion, a plurality of groups of elements, each group containing a live and a grounded electrode and a supporting unit for the electrodes, and electric contact means for each group, the means including a part to assist in establishing a cir- 4. In an electrical warp stop motion, a plurality of substantially separate similar units, each unit being individually removable, a plurality of electric contact bars having live and grounded electrodes, each bar held between two units, and means dependent upon a grouping together of the separate units in close proximity to each other to establish a circuit common to the units and to energize all of said live electrodes;

5. In an electrical warp stop motion, a plurality of substantially similar units, a plurality of electric contact bars having live and grounded electrodes, each bar held between two units, and resilient electric contacts carried by certain of the units, said contacts to establish a circuit running for the full width of the warp stop motion and common to all otsaid units and said cont-acts also having electrical engagement with the live electrodes of the several bars.

6. In an electrical warp stop motion, a plurality of substantially similar units, a plurality of electric contact bars having live and grounded electrodes, each bar held between two units, and resilient electric contacts carried by certain of the units, said contacts to establish a circuit running for the full width of the warp stop mot-ion and common to all of said units and said contacts also having electrical engagement with the live electrodes of the several bars, said contacts being dependent for their maintenance upon a close relationship of the several units.

7. In an electrical warp stop motion, a plurality of substantially similar units, a pluralit Y of electric contact bars having live and grounded electrodes, each bar held between two units, said units being clamped together to form a substantially unitary structure, and substantially similar electric contacts carried by each unit, said contacts being electrically connected by the placing of the units in close relationship so as to provide a circuit running for the length of the unitary structure and said contacts also energizing the live electrodes of the contact bars.

8. In an electrical warp stop motion, a plurality of substantially similar units, a plurality of electric contact bars having live and grounded electrodes, each bar held between two units, a pair of electrically connected contact members carried by each of the units, one member of each pair having contact with the live electrode of a contact bar and the other member of each pair being electrically connected to the adjacent pair.

9. In an electrical warp stop motion, a plurality of groups of elements, each group containing two electrodes of opposite polarity and a supporting unit for the electrodes, and electric contact means for each group, each contact means connected to an adjacent similar means and also to one of the electrodes of a group.

10. A unit for electrical warp stop motions operating with a support to hold a plurality of the units, the unit having provision for suporting a contact bar and having also electric contact means to engage a contact bar and also engage a similar adjacent contact means on the support.

11. In an electrical warp stop motion, a plurality of groups of elements, each group containing two electrodes of opposite polarity and a supporting unit for the electrodes, electric contact means for each group, each contact means connected to an adjacent similar means and also to one of the electrodes of a group, and means to connect any group electrically to an external circuit.

12. In an electrical warp stop motion, a plurality of groups of elements assembled as a unitary structure, each group having a supporting unit, a detector bar supported thereby, and a contact device, the device including two contact elements one for the contact device of the adj acent group and one for the contact bar of a group.

13. In an electrical warp stop motion, a plurality of groups of elements assembled as a unitary structure, each group having a supporting unit, a detector bar supported thereby, and a contact device, the device including a single spring bent to have two contacting parts one of which engages the contact device of an adjacent group and the other part of which engages a contact bar.

In testimony whereof I have hereunto affixed my signature.

OSCAR V. PAYNE. 

